Grease-trap.



G. J. DEHN.

GREASE TRAP.

APPLIGATION FILED Nov. 9. 1910.

1,071,889. Patented Sept. 2, 1913.

GEORGE J. DEHN, 0F GHIGGO, ILLINOIS.

GREASE-TBA?.

.Speccatiun of Letters Patent.

Patented Sept. 2,1913.

Application led November 9, 1910. Serial No. 591,522.

To all 'whom it may concern.'

Be it known that I, Gronau J. Denn, a resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Grease- Traps, `of which the following is a full, clear, and exact description.

The invention relates to grease-traps of the type used for receiving drainage containing grease and for separating the grease from the liquid, to prevent the grease in the drainage from passing to the sewer.

The invention desi ns to provide an improved grease-trap w ereby the grease will be separated from the drainage and held in the trap, and also an improved greasetrap, in which means are provided for cooling the drainage to congeal the grease, so that it will remain in the upper port-ion of the trap or on the surface of the column of drainage therein, instead of being carried through the trap with the drainage.

The invention further designs to provide a grease-trap of improved construction.

The invention consists in the several i novel features hereinafter set forth and more particularly defined by claims at the conclusion hereof.

In the drawings: Figure 1 is a central vertical section of a grease-trap embodying the invention. Fig. 2 is a horizontal section taken on line 2 2 of F ig. 1. Fig. 3 is a view similar to that shown in Fig. 1, showing a solid baiiie or partition substituted for the bame with a water chamber shown in Fig. l. Fig. 4 is a section taken on line 1.4 of Fig. 1. Fig. 5 is a perspective of the solid baiiie, shown in Fig. 3.

The improved trap comprises a receptacle or basin 10, providedmwith a closed bottom 11 and a top 12 which is secured to the top of the basin by bolts 13. The chamber `121: in the basin is adapted to receive drainage containing grease and to retain the grease therein. At one side, the base is provided with a suitable connection 15, to which an inlet-pipe 16 is connected to conduct the drainage to the receptacle. The top 12. is provided with a connection 17 for a ventpipe 18. Basin 10, at the side opposite to that where the connection for the inlet-pipe is disposed, is provided with a connection 19 having an outlet-pipe 20 connected thereto to conduct the drainage to the sewer after the grease has been separated therefrom. A

'deflector or guide 21 is secured in the basin adjacent the inlet-opening .and extends downwardly from said opening, to form a duct which causes the drainage to be delivered into the .basin adjacent the bottom thereof. This defiector has flanges 21u secured to the basin-wall by bolts 22. A similar deflector 24l is secured in the basin adjacent the bottom of the basin to be conducted to the outlet-pipe 'and so that the accumulated grease on top of the column of Water in the basin will be trapped in the basin. For convenience in cleaning the deiiector 21, a plug 25 is connected to the top thereof which, when removed permits access to the duct or channel in said dcfiector. Delector 24 is provided with a similar plug 26 for the same` purpose.

A chambered baffle or partition 27 is removably tted in the basin and extends across the lower portion thereof between the passages lin deflectors 21 and 211. This baie causes the drainage delivered at one side to be directed upwardly in the basin before it can escape, so that the grease therein will oat on top of the liquid-column and remain in the basin. This baille has a chamber 28 therein, through which water or a cooling liquid may circulate when the drainage received by the trap is hot, to cool ofi the drainage and to cause the grease to congeal s'o that it will remain in the trap and not be carried off with the drainage passing through the basin This batlie comprises side-walls 27, 27", end-walls 31, a bottom wall 29 and a top-wall 30. An inlet-pipe 33 for the cooli. liquid is connected by a screw to one o the end-walls 31 and a. discharge pipe 34 is connected to the opposite end-wall, and resultantly, when water for the purpose of changing the temperature of the drainage is supplied through pipe 33, the water will pass and circulate through the chamber 28 in the baille 27 and be discharged through the pipe 34. This chambered baie or partition is removably held in the basin between lugs 3G which are formed on the inside of basin 10. This baiile is adapted to rest on the bottom of the basin, so that the drainage will not pass beneath it and may be removed at any time, when the top 12 has been removed and pipes 33 and 34 are disconnected by withdrawing it upwardly suiiiciently to clear the ribs 36. To insure a snug fit between the end-walls 31 and the basin, said walls and the abutting portion of the basin may be tapered. The

removability of this partition renders interchangeable so that when desired a solid or unchambered battle 37 may be substituted therefor, as shown in Fig. 3 and furthermore, in practice it is sometimes desirable to remove any accumulation on the bottom of the trap and to clean the baiie. The removability and interchangeability of the 'battles provided for by this construction,

makes it possible to employ the same trap Where a cooling-liquid is to be circulated therethrough, as well as when a coolingliquidl is not to be used, without any other change than the mere introduction of the desired baiile. 0bviously, when the top 12 is removed from the body of the basin 10, the battle may be removed and the basin may be thoroughly cleaned and the baliier may also be cleaned. Baiiie 37 is provided with flanges 39, which, when placed in the receptacle and held between lugs 36, close the openings in the basin through which pipes 33 and 34 pass to the baille.

.The basin-top 12 is provided with a handhold 40 4which is normally closed by a cap 41', which is removably held in place by a saddle 42 and a screw.43, the saddle engaging lugs 44 on the top 12. :By loosening the screw and 'turning the saddle, they may be turned to release the' cap 41.

s 1n operation, the drainage passing through pipe 16, will be deflected downwardly by the deflector- 21 and delivered to the bottom of the basin, and thence it will pass upwardly, being brought into contact with the partition or baiile 27, and will be directed to the upper portion of the liquid-column in the trap. The inlet and outlet connections 15 and 19-are disposed so that a liquid column willbe retained in the basin. rllhe grease in the drainage will thus be brought to the top of the liquid-column and congealed by the battle.y Passing to the other side of baille 27, the liquid from which the grease has been separated, will pass downwardly to the lower portion of the basin and be forced upwardly through the duct in deilectorl 24 and into the discharge-pipe 20. When thev solid baliie 37 is siibstituted for the chambered baille 27, the operation will be the same except that the drainage l will not be cooled.

The trap set forth, thus exemplifies one in which the trap-wall or baiile may be readily removed and which permits a chambered baffle to be substitut for a'solid wall or diaphragm ,or vice ersa. 'In many .instances, these devices are irst installed without making provision for a cooling liquid and when a non-removable baiiie is employed in the basin, it is necessary to take out the Aentire trap before "provision can be made cooling the drainage. lin the construction setgforth, 1f the trap is installed without making provision for a cooling liquid,

is limited.

it is not necessary to remove `the trap, 4but only to add the water connections and to substitute the improved chambered baiiie for the solid baiiie and in this manner the same trap may be used with or without a cooling liquid by mere interchange of battles. By providing deflectors having ducts therein, at the inlet and outlet connections and extending them outwardly adjacent to the bottom of the trap, the drainage must pass upwardly at one side of the baiiie and downwardly at theother side, thus increasing the cooling elect of the baiile, through which the Water circulates. Furthermore, the removability of the baffle makes it possible to tho-roughly and readily'clean out the' basin as well as the baiie. Another important advantageof the construction set forth, is that a cooling wall is provided in the basin and extends transversely across it, so that the size of the basin is not necessarily increased in order to make provision -for circulation of the cooling liquid. In some grease-traps now in use, the watery circulates around the chamber in the trap and necessarily the capacity of the trap is materially decreased vor the size of the trap increased by the presence of the ,circulation chamber, and in many instances the space available for this purpose,

rlhe invention is not to be understood as restricted to the details shown and described, since these may be modified within the scope of the appended claims without departing from the spirit and scope of the invention.

Having thus described the invention, what l claim as new and desire to secure by Let-l ters Patent, is: v

1. ln a grease-trap,'the combination of a basin, inlet and outlet connections for the drainage, and a baiie separately formed from the 'basin extending transversely across the chamber in the basin and having a chamber therein, and pipe-connections leading into said baiile at the opposite ends thereof and through the basin wall, for causing liquid to circulate through the battle.

2. In a grease-trap, the combination of a basin, inlet and outlet connections for the drainage disposed adjacent 'the top of the i basin, a baille separately formed from the basin extending transversely across the bottom of thecbasin and having a chamber therein, pipe connections leading to and from the ends of said chamber respectively and through the wall of the basin, and means for directing the drainagedownwardly 'from the inlet connection to the biottom of the basin at one side of said baiiie.

3. ln a grease-trap, the combination yof a basin, inlet and outlet connections for the drainage, a batiie removably held in the basin and having a chamber therein, and connections for causing liquid to circulate through sadchambea v 4. In a grease trap, the combination of a basin, inlet and outlet connections for the drainage, lugs on the inside of the basin, and a baflie formed to extend across the basin and having t-ransversely extending end Walls Vitting against the inside of the basin and between said lugs.

5. In a grease trap, the combination of a basin, inletand outlet connections for the drainage, said basin having tapered seats on the inside thereof, and a baille extending across the basin and having transversely extending end Walls fitting against said tapered seats respectively.

6. In a grease-trap, the combination of a basin, inlet and outlet connections for the drainage, lugs on the inside of said basin, a battle removably held in the basin by the lugs, said baille having a chamber therein, and connections for causing liquid to circulate through the chamber.

7. In a grease-trap, the combination of a basin, inletv and outlet connections for the drainage, a bale separately formed from the basin having a chamber therein and comprising side-walls, a bottom-wall and a top-wall, means for securing the baille in the basin, and pipe-connections leading through the basin into the ends of the baille. i

8. In a grease-trap, the combination of a basin, inlet and outlet connections for the drainage, a baile extending transversely across the basin and removably held in the basin, means adjacent the inlet connection for conducting the drainage downwardly to the bottom of the basin at one side of the baille, means at the other side of the baille extending downwardl from the outlet-connection, to cause the llquid in the lower portion of the column in the basin to pass to the outlet-connection, said baille having a chamber therein, and connections leading to and from said chamber.

GEORGE J. DEHN.

i Witnesses:

FRANK W. BEMM, HILDEN C. PETERSEN. 

